I'm going to start with an older 350 I got with the 58 GMC if it runs right.
If not I have a 91 350 out of a camaro with TPI, but I also have an edelbrock manifold that will fit that motor.
There is a 350 TPI in the 88 IROC (I know it runs).
There is a low milage 350 crate motor in the 96 box van (it runs too).
Also a 350 in the 72 pickup (old power pack heads).
I don't count the 307 that came in the truck.
I also have a 302 out of an 84 trans am but not sure about it.
It's still in my 80 Monte Carlo that I bought back from the insurance company.
Need to build an engine test stand.
If I didn't have a motor I would go with an LS.
Do you mean like those front mounts I cut off the front crossmember?
I'm going with the side mounts.
I'm not sure I will use that bell housing.
Also I might change to an automatic later so that crossmember will have to come out.